/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/PreviewMesh.h
Notify that a deferred edit is completed and cause update of rendering data structures for modified Triangles. This can reduce the cost of mesh updates, but only if SetEnableRenderMeshDecomposition(true) has been called
void NotifyRegionDeferredEditCompleted ( const [TSet](API\Runtime\Core\Containers\TSet)< int32 > & Triangles, EMeshRenderAttributeFlags ModifiedAttribs )